Trifluoroacetic acid → HCID 89761835, compound

Participants

Reaction Steps

To a solution of 4-(2-(2-hydroxypropan-2-yl)phenyl)-N-(4-methoxybenzyl)-N-(thiazol-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-sulfonamide (300 mg, 0.543 mmol) in DCM (5 mL) was added TFA (0.4 mL, Spectrochem) at 0° C. The reaction mixture was stirred at ambient temperature for 2 h. After completion, the reaction mixture was quenched with saturated sodium bicarbonate solution (10 mL) and extracted with DCM (2×10 mL). The organic layer was dried over sodium sulfate and concentrated under reduced pressure to obtain crude material (47% by LCMS) that was purified by prep HPLC to obtain 4-(2-(prop-1-en-2-yl)phenyl)-N-(thiazol-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-sulfonamide as a white solid (45 mg, 20.0%). MS (ESI, positive ion) m/z; 414.1 (M+1). 1H NMR (400 MHz, DMSO) δ 12.51 (s, 1H), 7.50-7.26 (m, 4H), 7.21 (d, J=4.6 Hz, 1H), 7.16-6.94 (m, 1H), 6.77 (d, J=4.5 Hz, 1H), 6.23 (d, J=8.4 Hz, 1H), 5.10 (s, 1H), 4.96 (s, 1H), 4.41-4.08 (m, 2H), 3.52 (d, J=11.7 Hz, 2H), 1.96 (s, 3H).

Provenance & Evidence